Author Idle surging and throttle not operating  (Read 499 times)

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  • Online BeToney   us

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    Online BeToney

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    • Bike: 2017 VFR1200XDCT
    • City / Town: Olympia, Wa
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    Idle surging and throttle not operating
    on: Sep 10, 2022, 02.12 am
    Sep 10, 2022, 02.12 am
    I was an hour and a half into a ride this morning, the bike was running absolutely flawlessly one moment and a second later it started surging and chugging as it came to a stop on the side of the road. 
    The motor will turn over and start but the idle surges up and down quickly and the throttle does absolutely nothing.  The gear indicator on the screen just shows a dash - (DCT model) and it will not go into gear.

    The fluctuating idle happened to my truck years ago and it was the TPS, trying a forum search, some of the results mentioned a MAP sensor?  Anyone have knowledge of these symptoms or possible TPS or MAP issues?  The dealer is booked until the end of the month before they can even start diagnosing the issue, let alone ordering parts or starting repairs.

    Thanks in advance.

  • Online Beer Belly   england

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    Online Beer Belly

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    Re: Idle surging and throttle not operating
    Reply #1 on: Sep 10, 2022, 08.23 am
    Sep 10, 2022, 08.23 am
    Agree, sounds like a TPS issue to me.

  • Online BeToney   us

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    • #2

    Online BeToney

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    • Bike: 2017 VFR1200XDCT
    • City / Town: Olympia, Wa
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    Re: Idle surging and throttle not operating
    Reply #2 on: Sep 18, 2022, 12.53 am
    Sep 18, 2022, 12.53 am
    **Update**  This ended up being an embarrassing user error. 
    I decided to re-check the last maintenance I performed before the incident, which was cleaning the air filter.  Upon opening the airbox, I was shocked to find a blue paper towel inside the intake snorkle.
    While cleaning the air filter a few weeks prior, I carelessly left a paper towel in the airbox and it got sucked into the intake of cylinder #1 and jammed the butterfly valve.   :789:
    Everything put back together and the bike operated normally on a road test.  After almost 50 years of wrenching on cars and bikes, that's the first time I have ever been so inattentive when putting something back together.  Lesson learned.



  • Offline thetrecker   ie

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    Offline thetrecker

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    Re: Idle surging and throttle not operating
    Reply #3 on: Sep 18, 2022, 09.15 am
    Sep 18, 2022, 09.15 am
    No embarrassment BeTony, just an error. Great you got it sorted.

    Tom

  • Offline Pickaxe   gb

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    Offline Pickaxe

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    Re: Idle surging and throttle not operating
    Reply #4 on: Sep 20, 2022, 10.34 am
    Sep 20, 2022, 10.34 am
    Nice to see an honest reply and good outcome. We've all done similar.

  • Online BeToney   us

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    Online BeToney

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    Re: Idle surging and throttle not operating
    Reply #5 on: Sep 21, 2022, 02.15 am
    Sep 21, 2022, 02.15 am
    @thetrecker and @Pickaxe  Thanks for the kind replies, hopefully my mistake can be a lesson for others.

     



    arab-exile